Shoe-finishing machine



3l. ,480,601 s. A. DOBYNE f SHOE FINISHING MACHINE Jan. 15 1924.

Filed Jan, 2o. 1922 Patented Jan. 1s, 1924.

7 UNITED STATES PATENT OFFICE.-

STEPBEN L DOBYN'E, OF ST. LOUIS, MISSOURI, ASSIGNQIt T0 CHAMPION SHOE MA- CHINEBY COMPANY, F ST. LOUIS, MISSOURIg-'ACORQRATION OF MISSOURI.

I 'sHoE-FrNrsmNG MACHINE.

Application led January 20, 1922. Serial No. 530,550.

o all whom t may concern:

yBe it known that I, STEPHEN A. VDonYNn, a citizen of the United States, and residing at St. Louis, Missouri, have invented the new and useful Im rovement in Shoe-v Finishing Machines, o which the following is a specification.

This invention relates to shoe finishing machines of the kind employing rotating finishing elements, such as sanding wheels, and the like.

Accordin machines ot this kind the dust produced by the finishing operation is carried off by means of air suction devices. To this end a suction fan is usually provided which produces 4suction in a suitable conduit, such conduit having branch conduits leading therefrom to the 4various finishing elements. The suction in each conduit draws the dust produced by the finishing operation into the conduit from which it is discharged into a suitable receiver. According" to the usual practice, the conduits are open at each finishing element-so that the suction is continually drawing air through such openings with the result that when there are a number of `finishing elements, as is usually the case, Ithe exhaust fan must be large enough to supply adequate suction at all of the openings lat once.

One' of the objects of this invention, therefore, is to provide'means for closin the conduits except when work is actually eing performed, and then opening only the conduit to that element which is in use, so that the capacity of the exhaust fan may be reduced to that necessary to establish the required suction at one open-ing only.

Another object of this invention is to provide means for closing the conduit and means whereby the act of presenting the work to the finishing element ma be effective to open the appropriate con uit and establish the suction necessary to carry oi the dust.

Further objects will appear from the detail description taken in connection with the accompanying drawing, in which:

Fi re 1 is a partial view in elevation of the ishing machine embodying this invention; i

Figure 2 is an enlarged plan view of one of the finishing elements 'and the conduit leading thereto; and

Figure 3 is a section on line 3-3, Figure 2.

to the present practice, inv

Referring to the accompanying drawing. the machine comprises one or more standi ards 1 carrying in suitable bearings a driving shaft 2 and a driven shaft 8.' Theusual driving connections (not shown) between the shafts 2 and 3 may be had. A suction tan 5 may be mounted on or adjacent to the frame 1 and driven by means of a belt 6 from the shacft 2 or by other suitable means. The fan 5 exhausts the air from the conduit 7 connecting with the cross conduit 8 running along the machine opposite the various finishing elements 9. At each finishing element 9, a conduit 10 is tapped into the cross conduit 8l and extends to the finishing element, being provided with a hood 11 partially surrounding the finishing element ada ted to catch the dust produced by the i linis ing element. Each hood 11 may be suitably supported upon the cross member 4 by means of a bracket 12. The construction thus far described is all of the usual type met with in this kind of a machine and may be of any suitable construction. The finishing elements 9 are mounted at intervals upon the shaft Each clement 9 is mounted upon a hub 13 which is loose upon the shaft 3. rlthis hub is provided at one end with a flange 14 and is provided at the other end with a threaded portion 15. the portion between being of suitable shape, usually cyliu drical,` to properly support the finishing ch ment 9. A nut' 16 engaging the threaded )ortion 15 is adapted to clamp the element 9 etween it and the flange-14 so as to secure the same upon the hub 13. The bore of the hub 13 has an enlarged portion 17 at onetend thereof, the remaining portion of said bore being adapted to t loosely on the shaft 3 so as topermit relative movement between the element 9 and said shaft. A collar 18 fixed to the shaft 3 by means of a Iset screw 19 limits the movement of the hub 13 along the shaft in that direction. Y

A sleeve20 is adapted to fit loosely on the shaft 3 and the outside thereof is adapted to fit loosely within the enlarged portion 17 of the bore of the hub so that this sleeve 20 may be able to slide upon the shaft. The sleeve 20 is provided with a longitudinal slot 21 adaplted to engage the head of the screw 22 in t e shaft so as to guide and limit such longitudinal movement. The sleeve 20 is n 3, the screw head 22 slidin torsion spring 25 is fixed :at one end to a ange 26 on' .the sleeve 20 and at thefother end to the flange 14 on the hub 13. This sprino tends to turn the hub 13 and therewith tlie element 9 With respect to the sleeve 20 and, therefore, with respect to the shaft 3 in such a way as to move the Screw head 23 in tbe cam groove 24 to one end of said groove. It will be seen that the movement of the element 9 relative to the shaft 3 will result in a movement of the screw 23 along the camgroove 24, Where by the sleeve 20 Will be moved longitudinally of the shaft in the slot 2l.

Each conduit is provl ed with a damper 27 mounted on a shaft 28 provided with an arm 29 connected b a link 30 to one end of a lever 31 pivote at 32 on the frame and carrying atlv its other end a cam rolle]` 33 adapted to engage the outer face of'theflange 26. A spring 341 attached at one end to the arm 29 and at the other to the conduit 10 tends to hold the damper 27 in closed position and at the same time throughthe connedfions 30, 31 to maintain the cam roller 33 in engagement with the flange 26.

In operation the shaft 3 rotates in the direction of the arrows shown in I4`igure 1 and by means of thes'erew 22 engaging the sleeve and the spring 25 engaging the hub 13,

carries the element 9 withit. Upon engage 1 ment of the work With the element 9, said element Will necessarily be retarded.

This will have the effect of retardin'g the hub 13 wthrespect to the shaft 3 whereupon, the

sleeve 20 being carried with the shaft, The screw 23 will be moved along the cam groove 24. By this action the sleeve 2O will -be forced to the left, Figure 3, thereby' moving the cam roller 33 to the left, Figures 2 and 3, andconsequently moving the long arm ci the lever 31, the connected link and the arm 23 to 'the right, Figure 2, whereby the damper 2 Willbe turned in the conduit 10 so as kto open that conduit and establish snc-tion in the hood 11 to carry od the dust.

It will be seen, therefore, that means are provided whereby the simple engagement of thevwork with the iinishing element will operate to Vopen the damper in the corresponding conduitvlO" so as' to provide the necessary suction to carry oli the dust. 1n this way all of the conduits 10 will remain closed except the one leading to the finishing element in immediate use and that one will remain open only so long as the work remains in engagement with said element being closed automatically as soon as the work is disengaged.

It is lobvious that various changes may be made in details of construction Without departing from the spirit of this invention; it is, therefore, Ito be understood that'this linvention is not to be limited to the specitic details shown and described.

Having thus described the invention, what is claimed is: l 1. In a shoe finishing machine, the connoination with a rotary finishing tool, its dust hood and an outlet connection therefrom, of a damper in said connection, a drive sha-ft. on which said tool is loosely mounted,

an endwise movable'g'rooved cam sleeve be- *Ween said tool and said shaft, a roll onf saidI tool engaging the groove in said c'am, and an operating connection from said sleeve to said damper.

2. In a shoe bination With a rotary iinishing tool, its dust hood and an outlet connection there from, of a damper in said connection, a drive sliaft'on which said tool is loosely mounted,

C. finishing machihe, the coman endwise movable grooved cam sleeve lx1:-

tween said tool and said shaft, a roll on said tool engaging the groove in Said cam, and an operating lever for said damper, pivoted on said connection and leading to said sleev for operation thereby.

In testimony wheieof atlix my signa-l ture this 7th day of December, 1921,`

STEPHEN A.. DBYNE. 

